Paving-brick



F. B. DUNN.

PAVING BRICK.

APPLICATION FILED MAY 2, 1919.

1 397 5 5 Filed May 2, 1919 Patented Nov. 22, 1921.,

W35 E A E 07/ W1 s; E dE /e fnr A Q WAHW un t. stares riaann 3. Dra n, or conninanr, OHIO.

' teatime-anion.

aaeaaoa.

Specification of Letters Patent.

EHSSUE Patented Nov. 22, f9%lt.

- Application filed May 2, 1919. Serial No. 294,226.

To all whom it may concern:

Be it known that I, FRANK B. DUNN, a citizen of the United States, residing at Conneaut, in the county of Ashtabula and "State of Ohio, have invented certain new and useful Improvements in Paving-Bricks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, formin part of this specification.

l dy invention relates to paving brick, and particularly to that type thereof known to the brick industry as wire-cut brick.

The objects of my invention are to provide a side surface of a wire-cut brick with a plurality of spacing studs, lugs or projections of uniform dimensions adapted to space the bricks uniformly apart when laid in a pavement, and preferably with depressions adjacent to said studs adapted to receive said projecting studs when two brick are reversely placed together, thus allowing the fiat surface of adjoining bricks to contact when stacked for drying and burning during manufacture, to prevent the crushing of said studs and destroying their uniformity, and preventing the bending of the bricks during manufacture; said grooves also facilitating the flow of binder material between the bricks when laid in apavement.

The features of my invention are hereinafter fully described andpointed out and are illustrated in the accompanying drawings in which:

Figure 1, is a perspective view of a wirecut paving brick embodying my invention.

Fig. 2, is a plan View of the same as laid in a pavement.

Fig. 3, shows the same as stacked fordrying and burning.

In these drawings A indicates a paving brick having wire-cut surfaces B, and dieformed surfaces C and D. On one of the dieformed surfaces D, I mold projecting spaclng studs d of uniform height adapted to maintain uniform spaces between the courses of bricks when laid in a pavement. These projections or spacing studs d being formed on the brick A while the same is in plastic condition, it is necessary to provide means to protect said projecting studs when said bricks are stacked for drying or burning, as illustrated inFig. 3, so that they will not become distorted and their uniformity of height destroyed. For this purpose I provide, adjacent to the projecting studs d, de-

pressions E of suificient depth and width to receive the projecting studs of an adjacent brick therein, when the bricks are stacked for drying or burning, as shown in Fig. 3; and also permits the flat surfaces of the brick at each side of-said depressions E to contact when stacked for drying and burning, thereby preventing the brick from becoming bent or otherwise distorted during the process of drying and burning.

When the bricks are laid in a pavement as illustrated in Fig. 2, the vertical depressions E further operate to greatly facilitate the flow of liquid .cement or other liquid. filling material downwardly between the bricks, so that the spaces between the bricks will be completely filled therewith, and the bricks thoroughly cemented into a monolith, and the joints made water-proof.-

Having thus fully described my invention so as to enable others to utilize the same, what I claim as new "and desire to secure by Letters Patent is As an article of manufacture, an unpressed paving brick cut from a continuous column of clay having two "transverse grooves in one of the die-formed surfaces face adjacent to the same relative side of each of said transverse grooves, substantially as set forth.

In testimony whereof I affix my signature.

FRANK B. DUNN.

.thereof, and perimetrical'studs projecting from the surface of said die-*formed'sur- 

